Detecting legacy powered device in power over ethernet system
US7856561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2005 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Oct 4, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Novel system and methodology for detecting a Powered Device (PD) in a Power over Ethernet (PoE) system. A PD probing circuit generates a detection signal supplied to the PD and determines a PD response signal produced in response to the detection signal. Based on the PD response signal, the control circuit determines a detection value for identifying the PD. In particular, the control circuit concludes that the PD is a device satisfying a PoE standard if the detection value is in a first predetermined range, and concludes that the PD is a legacy PD device if the detection value is in a second predetermined range outside of the first predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.